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		<center><h3>大类管理（一）菜单</h3></center>
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			<a href="main.html" target="main">管理选项1</a><br>
			<a href="main2.html" target="main">管理选项2</a><br>
			<a href="main3.html" target="main">管理选项3</a><br> 
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